Tips for Multi-Resolution Delphi Applications

When designing forms in Delphi, its often useful to write the code so that your application (forms and all objects) looks essentially the same regardless of what the screen resolution is. The first thing you want to remember early on in the form design stage is whether  youre going to allow the form to be scaled or not. The advantage of not scaling is that nothing changes at runtime. The disadvantage of not scaling is that nothing changes at runtime (your form may be far too small or too large to read on some systems if it is not scaled). If youre not going to scale the form, set  Scaled  to False. Otherwise, set the property to True. Also, set AutoScroll to False: the opposite would mean not changing the forms frame size at runtime, which doesnt look good when the forms contents do change size. Important Considerations Set the forms font to a scalable TrueType font, like Arial. Only Arial will give you a font within a pixel of the desired height.​  If the font used in an application is not installed on the target computer, then Windows will select an alternative font within the same font family to use instead. Set the forms Position property to something other than poDesigned, which leaves the form where you left it at design time. This usually ends up way off to the left on a 1280x1024 screen—and completely off the 640x480 screen. Dont crowd controls on the form—leave at least 4 pixels between controls  so that a one-pixel change in border locations (due to scaling) wont show up as overlapping controls. For single line labels that are alLeft or alRight aligned, set AutoSize to True. Otherwise, set AutoSize to False. Make sure there is enough blank space in a label component to allow for font width changes - a blank space that is 25% of the length of the current string display length is a little too much but safe. Youll need at least 30% expansion space for string labels if you plan to translate your app into other languages. If AutoSize is False, make sure you actually set the label width appropriately. If AutoSize is True, make sure there is enough room for the label to grow on its own. In multi-line, word-wrapped labels, leave at least one line of blank space at the bottom. Youll need this to catch the overflow when the text wraps differently when the font width changes with scaling. Dont assume that because youre using large fonts, you dont have to allow for text-overflow—somebody elses large fonts may be larger than yours! Be careful about opening a project in the IDE at different resolutions. The forms PixelsPerInch property will be modified as soon as the form is opened, and will be saved to the DFM if you save the project. Its best to test the app by running it standalone and edit the form at only one resolution. Editing at varying resolutions and font sizes invite component drift and sizing problems. Make sure that you set your PixelsPerInch for all your forms to 120. It defaults to 96, which causes scaling problems at a lower resolution. Speaking of component drift, dont rescale a form multiple times, at design time or runtime. Each rescaling introduces round-off errors which accumulate very quickly since coordinates are strictly integral. As fractional amounts are truncated off the controls origins and sizes with each successive rescaling, the controls will appear to creep northwest and get smaller. If you want to allow your users to rescale the form any number of times, start with a freshly loaded/created form before each scaling so that scaling errors do not accumulate. In general, it is not necessary to design forms at any particular resolution, but it is crucial that you review their appearance at 640x480 with large and small fonts, and at a high-resolution with small and large fonts, before releasing your app. This should be part of your regular system compatibility testing checklist. Pay close attention to any components that are essentially single-line TMemos—things like TDBLookupCombo. The Windows multi-line edit control always shows only whole lines of text—if the control is too short for its font, a TMemo will show nothing at all (a TEdit will show clipped text). For such components, its better to make them a few pixels too large than to be one pixel too small and not show any text at all. Keep in mind that all scaling is proportional to the difference in the font height between runtime and design time, not  the pixel resolution or screen size. Remember also that the origins of your controls will be changed when the form is scaled—you cant very well make components bigger without also moving them over a bit. Anchors, Alignment, and Constraints: Third party VCL Once you know what  issues  to bear in mind when scaling Delphi forms on different screen resolutions, you are ready for some coding. When working with Delphi version 4 or higher,  several properties are designed to help us maintain the look and layout of controls on a form. Use  Align  to align a control to the top, bottom left, or right of a form or panel and have it remain there even if the size of the form, panel, or component that contains the control, changes. When the parent is resized, an aligned control also resizes so that it continues to span the top, bottom, left, or right edge of the parent. Use  Constraints  to specify the minimum and maximum width and height of the control. When Constraints contains maximum or minimum values, the control can’t be resized to violate those constraints. Use  Anchors  to ensure that a control maintains its current position relative to an edge of its parent, even if the parent is resized. When its parent is resized, the control holds its position relative to the edges to which it is anchored. If a control is anchored to opposite edges of its parent, the control stretches when its parent is resized. procedure ScaleForm (F: TForm; ScreenWidth, ScreenHeight: LongInt) ;begin F.Scaled : True; F.AutoScroll : False; F.Position : poScreenCenter; F.Font.Name : Arial; if (Screen.Width ScreenWidth) then begin F.Height : LongInt(F.Height) * LongInt(Screen.Height) div ScreenHeight; F.Width : LongInt(F.Width) * LongInt(Screen.Width) div ScreenWidth; F.ScaleBy(Screen.Width,ScreenWidth) ; end;end;

The Classical Romantic And Modern Era - 1058 Words

Ludwig Van Beethoven was German Composer Pianist I have never thought of writing for reputation and honor. What I have in my heart must out; that is the reason why I compose Ludwig Van Beethoven piano compositions were published at the age of thirteen. He took a simple ideas creates his works of music creates into large masterpiece. His life was plagued of having several tragedies mother was critically ill and father becomes alcoholic and 1ater they decided to dismiss his father from court choir. Personal life was marked by a struggle against deafness and some of his most important works were composed during the last 10 years of his life, when he was quite unable to hear. He was well known and viewed as transitional figure, most of composition were in period of the Classical Romantic and Modern era. Ludwig van Beethoven demand perfection and meant he worked extreme hard. Ludwig van Beethoven remained a mystery he he completed a single symphony within one year. 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The Impressionist Era all started with Claude DebussyRead MoreEssay on The Romantic Era a.k.a. the Enlightment Era649 Words   |  3 PagesThe romantic era was mostly considered the enlightenment era because it brought change to the way a person would look at nature and themselves. This changed how people imagined things. By the end of the 19th century the romantic era was started. Many artisans took this change to make literature, music, and poetry more emotional and self-embodiment. During this time period artists became famous and inspired many people with their works. Caspar David Friedrich was a famous artist who lived from 1774-1840Read MoreFrom the concrete structure of the Baroque period to the free-form structure of the Modern period1300 Words   |  6 PagesFrom the concrete structure of the Baroque period to the free-form structure of the Modern period each composer brings forth a new understanding and value to their time period. 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The Dark Side Of Zombies - 1714 Words

Darkness devoured everything in sight. A sea of lifeless moans crashed into the walls that kept me prisoner. I could feel the hot breath of those creatures seeping through the walls. Paranoia invaded my brain like the disease that infested those monsters. They were constantly trying to get in. They knew I was here, I was a meal trapped in a cage and every intake of breath was a ring of the dinner bell. Suddenly the snaps of rotting wood punched my ear drum. The snarling monsters came tumbling through the gaps, their twisting bodies shuffling towards me. As their outstretched limbs searched for my flesh I was ripped away by the ring of a phone. The television had sucked me in once again. Casting me in the middle of the fictitious apocalypse. The concept of zombies has always been a welcomed thought to me but why? Why am I and other humans fascinated with the thought of this life threatening concept? These creatures are known by many names. 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Law of Contracting Electronically

Question: Discuss about the Law of Contracting Electronically. Answer: Introduction In the world of e-commerce, contracts created electronically have gained immense importance. Communication between people across the globe has become very easy and fast and is no more at the mercy of geographical distances. E contracts have become popular over the past decade due to technological advancement. Therefore contracts created by electronic means have been recognised in the legal parlance as well. A contract which is formed, offered, accepted and finally executed using a software program is termed as an electronic contract. It is very evident that an e contract also has all the essential elements that are there in traditional paper based contract. Any contract entered into should be signed by the contracting parties, thus in the electronic mode of contracting, digital signatures are used for signing the contract which is similar to the traditional paper based method. In a contract created by electronic means there is no existence of paper or other such hard copies. What is offer? Before entering into a valid enforceable contract there has to be an offer made by one party to the other for a consideration and the same should be duly accepted by the offeree within a considerable period of time and communicated in a valid manner. Due to e contracts becoming prevalent more and more in this world of e commerce it is very important to understand what construes an offer. E contracts are either entered via emails or through websites of various business houses. Email communications are clear and very much similar to the other means of contracting but in the context of website communications it is very important to understand the difference between an offer and an invitation to treat An invitation to treat is not termed as a binding contract if the terms mentioned in the websites are accepted. A display on the internet is basically an invitation which is made by the businesses to the visitors who would then make an offer on their own basis the invitation. Once the same is accepted a contract is said to have formed. For example when a person advertises his products to sell on his website, it is construed that he is inviting people to make an offer to him for purchase of goods. When the buyers make an offer to the seller for the purchase of goods displayed on the websites after accepting the terms and conditions mentioned and the price at which the goods are displayed to be sold and the same is accepted by the seller, only then a valid contract is said to have been entered into. Therefore it is well said that displays on the internet websites do not construe a valid contract until and unless the buyers make an offer to buy the products and the services displayed. H owever there have been arguments in this regards wherein display of goods and services on a website may be called as a ready offer by the seller to a host of buyers and it all depends whether a website is an interactive one or a non-interactive one. For any contract to be enforceable by law it has to be accepted by the offeree with regards the terms and conditions and the consideration. Once the same is done it is construed that an acceptance has been done of the offer made by the offeror. An offer and acceptance in a contract entered by electronic means takes place in a manner which is similar to the other means of contract with slight deviations. What is acceptance? An e contract is entered into by two methods one is through internet websites of various business houses and secondly is via communication of an offer by one party to the other through an email. Thus when any business organization displays goods and services on their websites for sale with a price marked then it is said to be construed as a mere invitation. However once the buyer shows interest in buying a product or service after accepting the terms and the payment, the said invitation gets converted into an offer. Once the offer is accepted by the seller it is said that a legally enforceable contract has been entered into. However in case of an offer made by an email, the question arises as to at which point of the transaction can it be said that an offer has been accepted and duly communicated as well. For the same a new section 13A has been inserted in the Electronic Transaction Act 2002 which specifies that an acceptance of an offer made by electronic means is said to have been communicated to the offeror at a time as mentioned in Section 11. Thus as per Section 11, an electronic communication is said to have been received when the receiver has designated a specific information system for the receipt of messages. Hence the time when the message enters the system specified and if any such specification is not made then the time when the communication is attended by the receiver. Therefore an offer is said to have been accepted by the offeree in an e contract once the acceptance communication i.e. email from the offeree enters the designated information system of the offeror. Comparison Between E Contract and Traditional Contract Even though entering into a contract by electronic means is increasing with the advancement in technology yet there are some differences with the traditional method of contracting. The later clearly defines the time and place of entering into a contract and thus enables ease in application of jurisdiction in case of disputes. But the same is difficult in case of an e contract where the contracting parties do not come face to face and thus makes it difficult for the contracting parties to abide by any particular law. The second important difference between the two modes of contracting is enforceability. Enforceability of a click-wrap agreement is easy to establish as compared to the browse-wrap agreement. The same was proved in the case of Hotmail Corporation v Van$ Money Pie Inc. where the court found that a click-wrap agreement is an enforceable one. However in the traditional method of contracting, all contracts are legally enforceable in the court of law. Thirdly the time duration for acceptance of an offer in an electronic mode of contracting is very short until otherwise mentioned. The time for acceptance of an offer in case of a traditional method of contracting is more simply because of the speed at which the communication takes place in the former method. Therefore it is construed that even though online contracts are increasing day in and day out yet the complexity attached to it deters many from accepting the said mode. Withdrawal of Mistake In an E Offer When a mistake has been made while entering into a contract by any one or both the parties to the contract, there are some rules and principles applicable irrespective of the mode of contract- paper based or electronic. As per the Australian Law, the legal issues for such mistakes are similar for both the means of contract as stated by Electronic Transaction (Queenland) Act 2001 and Commonwealth Electronic transactions Act 1999. In an e contract an offer can be withdrawn only upon due receipt of the communication of such withdrawn by the receiving party. A mistaken offer can be withdrawn only by the offeror as it is he who has made a wrong offer basis which a contract is being executed. However the concept of Caveat Emptor applied to mistakes in an offer made in e contracts also wherein the offeree should be made aware of the same before such withdrawal is made as the wrong can be rectified after mutual deliberations and the offer can be revised. For example while selling products online if the e retailer quotes incorrect prices by mistake of a product which is duly accepted by the buyer and his order is also confirmed by the seller via an automated email and the seller realises later that the price quoted is incorrect then the question arises whether the party can withdraw a mistaken offer. As per the case decided by the Higher Regional Court of Frankfurt Main in the year 2002, a mistaken offer made by the vendor in an electronic contract could not be retrieved by the seller due to an automated mail generated of acceptance of the offer the court allowed the offeror to void the acceptance. However an opposite decision was spelt out in the year 2003 by the Regional Court of Cologne in a similar case wherein it stated that since the sales person accepted the offer by sending an automated mail without reviewing the offer, hence the seller would have the right to void the acceptance of a mistaken offer. However if it would have b een an invitation to treat then the same is possible to be withdrawn by the offeror. Therefore it is still a debatable topic whether a mistaken offer made by electronic mode is voidable or not. Resolution of Disputes In E Contracts To enable smooth functioning of contracts entered into by electronic means, the Australian Law has devised legal assistance for the parties to the contract for the resolution of disputes that may arise. The Australian Contract Law has been derived by the famous English Law wherein the contracting parties have the freedom to enter into a contract after due negotiations. The electronic contracts are regulated by the Federal, State and the Territory Electronic Transactions Acts and these are formed basis the UNCITRAL Model Law on Electronic Commerce. The Electronic Transactions Act 1999 has a code of conduct which specifies the procedures for resolution of disputes for contracts entered into via electronic means. Australia is a signatory to the Vienna Convention on Contracts for the International Sale of Goods. The said convention has set out certain rules applicable uniformly to the countries who are a part of this convention with regards sale of goods internationally. However adherence to the said conventions rules is not a necessity. The parties to the contract can chose the laws applicable to the country of one of the parties to the contract as well. Issues Concerning E Contracts The concept of contracting via electronic means is fast, paper-less and convenient yet there exist various issues and problems regarding the same. First and foremost is confidentiality of terms of contract. The hackers and the malwares have led to vulnerability of the confidentiality of businesses. Thus security is an issue especially with regards digital signatures. If a digital signature is hacked then it may lead to entering into unacceptable contracts by hackers thus leading to huge losses. Therefore the issue of ethics is yet to be addressed. Further to this another concern with regards digital signature is that the accuracy of the same cannot be verified to its hundred percent. Second issue is that the words used in an offer made through electronic means can be misleading. Due to the same, there is difficulty in understanding which law would be applicable for resolution of disputes. As the contracting parties generally communicate via exchange of mails, also the intent of the contracting parties is not understood as the persons are not face to face. Thirdly, it is very difficult to get assurance with regards the fact that the parties contracting are legally bound to enter into a contract and there may be situations where the person contracting may be a fraud or incapable to enter into a contract. Conclusion Thus on a concluding note it is clear that the increasing technological advancement has led to a shift in the method of entering into contracts from the paper based method to the electronic means yet the same is coupled with varying issues which needs to be addressed before the same can be applied by all the firms private as well as government institutions. The law also requires refinement and inclusion of sections dealing in various types of issues in the present Electronic transactions Act prevalent. Although the same is comprehensive in nature but is yet to be exhaustive. Security issues are still a big problem specially in case of contracts which needs to be accepted only after due signature by the offeree. The concept of digital signature is very good in the wake of globalization but the threats attached to it deters the business firms from using such a technology. Adequate ethical code of conduct and penal provisions should be spelt out so that globalization in business can inc rease. References: Are sellers Bound by Mistakes in Online Advertisements, Wilmerhale (Online), 30 June 2003 https://www.wilmerhale.com/pages/publicationsandnewsdetail.aspx?NewsPubId=91329 Argy, Philip and Martin, Nicholas, The effective formation of contracts by electronic means, Computer and Law (online), 30 July 2001, https://www.austlii.edu.au/au/journals/ANZCompuLawJl/2001/33.pdf Delaney, Hayden, and Francis, Briar, Electronic Signatures and their Legal validity in Australia Find Law Australia (online), https://www.findlaw.com.au/articles/5777/electronic-signatures-and-their-legal-validity-in-.aspx Donnie, L. Kidd Jr and William H. Daughtrey, Jr., Adapting Contract Law to Accommodate Electronic Contracts: Overview and Suggestions, (2000), Rutgers Computer and Technology Law Journal 215 Hotmail Corporation v. Van$ Money Pie Inc., 47 U.S.P.Q. 2d 1020, 1998 WL 388389 (April 1998, N.D.Cal.) O Hance, Business and Law on the Internet, McGraw Hill: Best of Editions 1996. Plimpton. Laura, The Law of Contracting Electronically, Entrepreneur (online), 29 January 2008, https://www.entrepreneur.com/article/189660.